Electrically-operated brake.



C. SAUNDERS. ELEUTRIGALLY OPERATED BRAKE. APPLICATION FILED MAR. 27,1906.

914,756 Patented Mar. 9, 1909..

UNIT ATE PATENT CHARLES SAUNDERS, OF PHILADELPHIA, PENNSYLVANIA,ASSIGNOR TO LIDGERWOOD MANUFACTURING- OOMPANY, A CORPORATION OF NEWYORK.

ELECTBICALLY-OPERATED BRAKE.

Specification of Letters Patent.

Application filed March 27, 1906.

To all whom it may concern:

Be it known that 1, CHARLES SAUNDERS, a citizen of the United States,and resident of the city of Philadelphia, in the county of Philadelphiaand State of Pennsylvania, have invented certain novel and usefulImprovements in Electrically-Operated Brakes, of which the following isa specification.

This invention relates to certain novel and useful improvements inbrakes and in the present instance particularly pertains to anelectrically operated band brake.

One of the objects of the present invention is to provide means foractuating a brake to throw the same into and out of operation throughthe making and breaking of an electric circuit.

The invention consists in the construction, combination and arrangementof parts set forth in and falling within the scope of the appendedclaims, and while I have herein shown and described by way ofillustration one particular embodiment of the invention, the same can besubjected to modification and changes without exceeding the scope of theclaims.

In the accompanying drawings, wherein an embodiment of the invention isillustrated, like characters of reference indicate like parts in all ofthe views.

Figure 1 is a view in side elevation showing an application of myimprovement; Fig. 2 is a view in end elevation showing the solenoiddevices and the armature or keeper operated by the same; Fig. 3 is a topplan view embracing a portion of the motor and showing the brakemechanism applied thereto.

Referring now to the drawings in detail, the letter A indicates a motorhaving the armature shaft B. To this shaft is secured the band wheel 0,while D is a band brake passing around said wheel and secured at thepoint 5, said band passing partially around the periphery of the wheeland at its opposite end is adjustably coupled with the brake lever Ethrough the medium of the screw coupling 6 which passes through theaperture of lug 7 carried at the end of the band brake, 8 indicating anut for securing the parts together. At 9 I have shown a pin passingthrough and securing the couping to the lever E. The band D ispreferably provided with a lining of leather, wood, fiber or othersuitable substance, as is Patented March 9, 1909.

Serial No. 308,243.

shown at 10, such lining forming the braking surface, but it is ofcourse to be understood that this lining is not necessary and may bedispensed with if desired. Secured to the outer surface of the band atthe point 12 is a hanger or bracket 13, carrying the solenoid coils 1 1,1 1, while F designates an armature or keeper member having the posts15, 15, extending into the solenoid coils, such posts being connectedthrough the medium of the bar 16. This keeper is secured at 17 to thelever E by cotter pin 17, as is clearly shown in Figs. 1 and 2. Thelever E in turn is pivoted at 18 to the bracket or support 19, rigidlyfastened at the point 20.

From the above description taken in connection with the accompanyingdrawings, the construction and operation of my improved brake devicewill be readily apparent to those skilled in the art. As heretoforestated, the lever is fulcrumed at the point 18 so that when currentwhich is supplied to the solenoids in any suitable manner is passingthrough the two solenoids the keeper or armature F is lifted and thebrake is loosened, swinging or moving on its fulcrumed point 18, butwhen the current is interrupted, the armature or keeper F falls,bringing its weight on the lever and the weights of the solenoids andthe like upon the band brake, which tends to tighten the same around theperiphery of the band wheel C.

It will be noted that I have provided an exceedingly simple yeteffective means for controlling band brakes and one which will be foundparticularly adapted for use in connection with the brakes used upon thedrums of hoisting engines and the like.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. The combination with a wheel, a brake therefor, a brake leverextending beneath the wheel and connected to the brake, a keeperconnected to said lever, and an electrical device connected to the brakeand designed to control the movement of the lever.

- 2. The combination with a a heel, a brake therefor, a lever extendingbeneath the brake,

an adjustable coupling connecting said lever 3. The combination of aWheel, {L brake lever, a brake band anchored at one end and secured tothe lever at the opposite end, a keeper and an electrical devicesuspended from the brake band.

4. The combination with a Wheel, of a band brake therefor, and means foractuating said brake including a lever connected thereto, a keeperconnected to the lever, a

10 solenoid suspended from the brake band and adapted to actuate thekeeper to elevate the lever and release the brake.

In testimony whereof, I have hereunto set my hand this 22nd day ofMarch, A. D. 1905.

CHARLES SAUNDERS.

VVitnesses F. ED. STUTZ, DEWITT W. SMITH.

